Subtraction sentences – numbers up to 10

key notes :

🟡 What is Subtraction?

  • Subtraction means taking away.
  • It shows how many are left.
  • Example: 6 − 2 = 4 🍎

🔢 Parts of a Subtraction Sentence

A subtraction sentence has three parts:

  • Start Number (Whole) → the big number
  • Minus Sign (−) → take away
  • Answer (Difference) → what is left

Example:
8 − 3 = 5
8 = whole number
3 = taken away
5 = leftover ✨

🍎 Use Objects to Subtract

Students can use:

  • Counters
  • Fingers
  • Blocks
  • Pictures

Example:
🍏🍏🍏🍏🍏 → 5 apples
Take away 2 🍏🍏
Left = 3 🍏🍏🍏

🎲 Subtraction Means “How Many Left?”

Ask simple questions:

  • “If you have 7 balloons and 2 fly away, how many left?” 🎈

This helps kids think in real-life stories.

🔁 Subtraction Facts up to 10

  • Practice facts like:
    10 − 1, 10 − 2, 9 − 3, 7 − 4, 6 − 1, etc.
  • Encourage memorizing small facts 😊

➖ Subtraction Sentences Can Be Shown in Different Ways

  • Pictures 🖼️
  • Number lines ➖📏
  • Objects 🧸
  • Fingers ✋

Example using a number line:
Start at 9 → jump back 4 → land on 5.

🧮 Order Matters

The bigger number must come first in Grade 1 subtraction.
Example:
8 − 5 ✔️ correct
5 − 8 ✖️ not for Grade 1

🌈 Subtraction Helps Us Solve Daily Problems

Examples:

  • Eating chocolates 🍫
  • Missing pencils ✏️
  • Lost toys 🧸
  • Sharing things

Learn with an example

🖊️Which picture shows 5 − 2 = 3?

  • This is the correct answer:
  • First, count all the fish, including the ones that are crossed out. There are 5 fish. Next, count how many fish are crossed out. 2 fish are crossed out.
  • Now count the fish that are not crossed out. 3 fish are not crossed out. This picture shows 5 − 2 = 3.
  • This picture shows 4 − 2 = 2:
  • This picture shows 4 − 1 = 3:
  • This picture shows 4 − 3 = 1:

🖊️Which picture shows 2 − 1 = 1?

  • This is the correct answer:
  • First, count all the fish, including the ones that are crossed out. There are 2 fish. Next, count how many fish are crossed out. 1 fish is crossed out.
  • Now count the fish that are not crossed out. 1 fish is not crossed out. This picture shows 2 − 1 = 1.
  • This picture shows 4 − 3 = 1:
  • This picture shows 5 − 4 = 1:
  • This picture shows 3 − 2 = 1:

🖊️Which picture shows 4 − 1 = 3?

  • This is the correct answer:
  • First, count all the fish, including the ones that are crossed out. There are 4 fish. Next, count how many fish are crossed out. 1 fish is crossed out.
  • Now count the fish that are not crossed out. 3 fish are not crossed out. This picture shows 4 − 1 = 3.
  • This picture shows 3 − 1 = 2:
  • This picture shows 3 − 2 = 1:
  • This picture shows 5 − 2 = 3:

Let’s practice!